:root {
  --ink: #172026;
  --muted: #53616b;
  --line: #dce4e6;
  --paper: #fff;
  --mist: #f4f7f8;
  --aqua: #55c4c6;
  --aqua-dark: #237f85;
  --navy: #123a4c;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
  letter-spacing: .02em;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
figure { margin: 0; }
.wrap { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.site-header { background: #fff; border-bottom: 1px solid #eef1f2; }
.header-row { min-height: 66px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; }
.header-links { display: flex; gap: 24px; font-size: 12px; }
.header-links a { color: #39454c; text-decoration: none; white-space: nowrap; }
.brand { justify-self: center; text-decoration: none; font-size: 15px; font-weight: 700; letter-spacing: .08em; }
.brand-product { justify-self: end; color: var(--aqua-dark); text-decoration: none; font-size: 13px; font-weight: 800; letter-spacing: .22em; }

.category-heading { padding: 50px 0 34px; text-align: center; }
.category-heading h1 { margin: 0; font-size: clamp(30px, 4vw, 47px); font-weight: 500; letter-spacing: .1em; }
.category-nav { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.category-nav__inner { display: grid; grid-template-columns: repeat(3, 1fr); }
.category-nav a { position: relative; padding: 17px 8px 14px; color: #3a474e; text-align: center; text-decoration: none; font-size: 14px; white-space: nowrap; }
.category-nav a::after { content: ""; position: absolute; left: 18%; right: 18%; bottom: -1px; height: 3px; background: transparent; }
.category-nav a:hover::after, .category-nav a.is-current::after { background: var(--aqua); }

.hero { position: relative; height: auto; aspect-ratio: 1900 / 828; overflow: hidden; background: #57b7b7; }
.hero-copy { position: absolute; z-index: 4; top: 17.7%; left: 7%; color: #fff; }
.hero h2 { margin: 0; font-size: min(5vw, 68px); line-height: 1.35; letter-spacing: .04em; }
.hero-media { position: absolute; inset: 0; z-index: 1; }
.hero-image { width: 100%; height: 100%; object-fit: contain; }
.hero-mobile { display: none; }
.hero::after { content: ""; position: absolute; z-index: 3; inset: 0; background: linear-gradient(90deg, rgba(15,91,94,.28), transparent 45%); pointer-events: none; }

.category-lead { max-width: 1040px; padding: 46px 0 58px; font-size: clamp(15px, 1.55vw, 18px); line-height: 1.95; }
.category-lead p { margin: 0; }
.category-lead p + p { margin-top: 7px; }

.section { padding: 96px 0; }
.section-title { margin: 0 0 52px; text-align: center; font-size: clamp(28px, 3.3vw, 42px); font-weight: 500; letter-spacing: .06em; line-height: 1.4; }
.about { background: var(--mist); }
.about-row { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 64px; background: transparent; }
.about-copy { padding: 0; }
.about-copy p { margin: 0; color: var(--muted); }
.about-copy p + p { margin-top: 18px; }
.about-visual { overflow: hidden; background: transparent; }
.about-visual img { width: 100%; height: auto; }

.features { background: #fff; }
.feature-row { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 64px; padding: 64px 0; border-top: 1px solid var(--line); }
.feature-row:last-child { border-bottom: 1px solid var(--line); }
.feature-copy { padding: 0; }
.feature-number { margin: 0 0 14px !important; color: var(--aqua-dark) !important; font-size: 12px; font-weight: 800; letter-spacing: .22em; }
.feature-copy h3 { margin: 0 0 24px; font-size: clamp(24px, 2.6vw, 34px); font-weight: 500; line-height: 1.55; }
.feature-copy p { margin: 0; color: var(--muted); }
.feature-copy p + p { margin-top: 12px; }
.feature-copy sup { color: var(--aqua-dark); font-size: .72em; }
.feature-note { margin-top: 22px !important; font-size: 12px; }
.feature-visual { display: grid; place-items: center; background: transparent; }
.feature-visual img { width: 100%; height: auto; }
.feature-visual--gif img { width: min(100%, 680px); height: auto; }

.content-guide { background: var(--mist); }
.section-intro { max-width: 680px; margin: -26px auto 44px; color: var(--muted); text-align: center; }
.content-card-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.content-card { grid-column: span 2; min-height: 315px; display: flex; flex-direction: column; padding: 32px; background: #fff; border: 1px solid #e1e8ea; border-radius: 4px; box-shadow: 0 10px 30px rgba(18,58,76,.05); }
.content-card:nth-child(4) { grid-column: 2 / span 2; }
.content-card__eyebrow { margin: 0 0 18px; color: var(--aqua-dark); font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.content-card h3 { margin: 0 0 18px; font-size: 22px; font-weight: 500; line-height: 1.55; }
.content-card > p:not(.content-card__eyebrow) { margin: 0; color: var(--muted); font-size: 14px; }
.coming-soon { align-self: flex-start; margin-top: auto; padding: 5px 12px; color: #68777e; background: #edf2f3; border-radius: 999px; font-size: 11px; letter-spacing: .08em; }

.purchase { padding: 88px 0; color: #fff; background: var(--aqua-dark); text-align: center; }
.purchase-inner { max-width: 780px; }
.purchase-eyebrow { margin: 0 0 12px; color: #cceff0; font-size: 11px; font-weight: 800; letter-spacing: .2em; }
.purchase h2 { margin: 0; font-size: clamp(28px, 3.6vw, 42px); font-weight: 500; letter-spacing: .05em; }
.purchase p:not(.purchase-eyebrow) { margin: 18px 0 32px; }
.purchase-button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-width: 280px; padding: 16px 28px; color: #fff; background: #bf0000; border: 1px solid rgba(255,255,255,.36); border-radius: 3px; text-decoration: none; font-weight: 700; box-shadow: 0 12px 28px rgba(0,0,0,.16); transition: transform .2s ease, box-shadow .2s ease; }
.purchase-button:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(0,0,0,.2); }

.footer { padding: 64px 0 24px; color: #b9c8ce; background: #0a2836; font-size: 13px; }
.footer-inner { display: grid; grid-template-columns: minmax(220px, 1fr) 2fr; gap: 80px; }
.footer-brand strong { color: #fff; font-size: 18px; letter-spacing: .08em; }
.footer-brand p { margin: 12px 0 0; line-height: 1.8; }
.footer-nav { display: grid; grid-template-columns: repeat(3, minmax(150px, 1fr)); gap: 42px; }
.footer-column { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.footer-column a { color: #b9c8ce; text-decoration: none; }
.footer-column a:hover { color: #fff; }
.footer-heading { margin: 0 0 8px; color: #fff; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.external-mark { margin-left: 5px; font-size: .9em; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 52px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); }
.footer-bottom a { color: #b9c8ce; text-decoration: none; font-size: 11px; }
.copyright { margin: 0 !important; text-align: right; font-size: 11px; }

@media (max-width: 860px) {
  .header-row { grid-template-columns: auto 1fr; }
  .header-links { display: none; }
  .brand { justify-self: start; }
  .about-row, .feature-row { grid-template-columns: 1fr; }
  .about-row { gap: 34px; }
  .feature-row { gap: 30px; padding: 52px 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 620px) {
  .wrap { width: min(calc(100% - 32px), var(--max)); }
  .header-row { min-height: 56px; }
  .brand { font-size: 13px; }
  .brand-product { font-size: 10px; }
  .category-heading { padding: 34px 0 24px; }
  .category-nav a { padding: 14px 5px 12px; font-size: 11px; }
  .hero { width: 100%; aspect-ratio: 6 / 5; }
  .hero-copy { top: 7%; left: 5.5%; }
  .hero h2 { font-size: 7.8vw; line-height: 1.3; }
  .hero-image--desktop { display: none; }
  .hero-mobile { position: absolute; inset: 0; display: block; }
  .hero-mobile__base { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 62% center; }
  .hero-mobile__inset { position: absolute; top: 42%; left: 5%; width: 36%; aspect-ratio: 1; overflow: hidden; border: 1.5px solid #fff; border-radius: 50%; box-shadow: 0 8px 24px rgba(18,58,76,.16); }
  .hero-mobile__inset img { width: 100%; height: 100%; object-fit: cover; }
  .hero::after { background: linear-gradient(180deg,rgba(26,124,130,.22),transparent 48%); }
  .category-lead { padding: 34px 0 46px; font-size: 15px; }
  .section { padding: 72px 0; }
  .section-title { margin-bottom: 34px; font-size: 28px; }
  .feature-copy h3 { font-size: 25px; }
  .feature-visual--gif { min-height: 260px; padding: 24px; }
  .section-intro { margin-top: -16px; margin-bottom: 30px; text-align: left; }
  .content-card-grid { grid-template-columns: 1fr; }
  .content-card, .content-card:nth-child(4) { grid-column: auto; min-height: 0; padding: 26px; }
  .content-card h3 br { display: none; }
  .coming-soon { margin-top: 24px; }
  .purchase { padding: 68px 0; }
  .purchase-button { width: 100%; min-width: 0; }
  .footer { padding-top: 52px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-nav { grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .footer-column:first-child { grid-column: 1 / -1; }
  .footer-bottom { align-items: flex-start; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}